608 RECORD OF CURRENT RESEARCHES RELATING TO 



Arthropocla on tlio one liand, and of the Cliordata (Timicata and 

 Vertebrata) on the other. 



Generative Organs of the Young Helix aspersa.* — M. Jourdain 

 has made some interesting observations on this subject, which are of 

 value from the wide view which the author has taken ; none who have 

 been engaged with these organs will be sorry to hear of M, Jourdain's 

 attempt to " preciser la terminologie," and in the presence of so many 

 different modes of stating observations, it will not be useless to 

 detail our author's synonymy of the chief parts of this somewhat 

 complex apparatus : — 

 Hermaphrodite gland ,. Ovary; testicle; racemose gland. 

 „ „ . I , J. r. ( Oviduct ; primary oviduct ; efferent canal ; fallo- 



Efferent duci of herma- ^.^^^ ^^^^^ ^^^^^'^^^ deferens (both invaginated) ; 

 phroditc gland . . , . j g^gj.ent canal of the hermaphrodite gland. 



.,, . . , J CEoe ; testicle; ovary; "glaire"; muciparous 



Albummiparous gland . . | ^^^^^^ . ^^^^^^^^ ^^J^] 



„ , , , (Pedunculated vesicle ; urinary bladder; recepta- 



Copulatory pouch .. ..| culura seminis. 



Muciparous glands .. Multiiid vesicles ; multifid prostate. 

 Genital vestibule .. .. Genital cloaca. 

 Spermatophore .. .. Capreolus. 



Young specimens of H. aspersa are very far from exhibiting all 

 these, with other, parts ; in them, the hermaphrodite gland is composed 

 of a small number of follicles, and they give off an efferent canal, with 

 a straight course; this rapidly increases in diameter and divides 

 lengthwise into an efferent and an ovigerous demi-canal ; the former 

 exhibits as yet no indications of a prostate, the latter has on it the 

 rudiments of the albuminiparous glands ; the two tubes soon separate 

 and the efferent duct becomes a complete canal ; as soon as this is 

 effected this latter forms a loop which gradually grows out to form the 

 penis. The flagellum is not yet developed ; there is no dart-sac, and 

 as yet there are no muciparous glands. These last are in time derived 

 from two small diverticula which are developed at the base of the 

 oviduct, and the differences observed in different species are merely 

 due to differences in the growth of these parts ; thus, if one is absorbed 

 we find the single muciparous gland of H. ohvoluta ; when they are 

 both developed but remain undivided, we have the form found in if. 

 cornea and others ; when one bud subdivides, we have the arrangement 

 found in H. Bangiana, and so on to the extreme form of H. pomatia. 



Gasteropoda from the Troas-t — In giving a list of the compara- 

 tively large number of forms brought home by Professor Virchow, 

 Von Martens points out that all the species are now to be found living 

 in the Mediterranean ; speaking generally, they exhibit no differences 

 as compared with more modern forms. Those not used for the pro- 

 duction of ptirple were, for the most part, probably used for food, as 

 are many of the same species at the present time. 



Gasteropoda from the Auckland Islands.^ — In giving a note on 

 the specimens collected in these islands, the same zoologist describes 



* 'Eev. Sci. Nat.,' i. (1880) p. 449. 



t ' SB. Ges. naturf. Freunde,' Berlin, 1879, p. 8G. % Ibifl., p. .S7. 



